package ui.view;

import java.awt.EventQueue;
import java.io.File;
import java.util.ArrayList;

import javax.swing.JFrame;
import javax.swing.JMenuBar;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.JTree;
import javax.swing.BoxLayout;
import javax.swing.JSplitPane;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTable;
import javax.swing.tree.DefaultTreeModel;

import com.sun.glass.events.MouseEvent;

import ui.controller.Control;
import ui.model.*;

import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.JEditorPane;
import javax.swing.JFileChooser;
import javax.swing.table.DefaultTableModel;

import java.awt.Color;
import java.awt.Component;
import java.awt.Window.Type;

import javax.swing.JInternalFrame;

import java.awt.BorderLayout;

import javax.swing.JPanel;
import javax.swing.JTextField;
import javax.swing.JToolBar;
import javax.swing.JButton;
import javax.swing.JList;
import javax.swing.ListSelectionModel;
import javax.swing.TransferHandler;
import javax.swing.AbstractListModel;

import java.awt.Choice;

import javax.swing.JComboBox;
import javax.swing.DefaultComboBoxModel;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.Icon;
import javax.swing.ImageIcon;

import Interfaces.CategoryListener;
import javafx.util.Pair;

import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.Font;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.ActionEvent;

public class GUI implements CategoryListener {

	private JFrame frmCyberPhysical;

	private final JMenuBar menuBar = new JMenuBar();
	private final JMenu mnNewMenu = new JMenu("File");
	private final JMenu mnNewMenu_1 = new JMenu("Edit");
	private final JMenu mnNewMenu_2 = new JMenu("Options");
	private final JMenu mnNewMenu_3 = new JMenu("View");
	private final JMenu mnHelp = new JMenu("Help");
	private final JMenuItem mntmOpen = new JMenuItem("Open");
	private final JMenuItem mntmNew = new JMenuItem("New");
	private final JMenuItem mntmSave = new JMenuItem("Save");
	private final JSplitPane splitPane = new JSplitPane();
	private final JSplitPane splitPane_1 = new JSplitPane();
	private final JScrollPane scrollPane_1 = new JScrollPane();
	private final JTabbedPane tabbedPane = new JTabbedPane(JTabbedPane.TOP);
	private final JScrollPane scrollPane_2 = new JScrollPane();

	private final MyCanvas canvas = new MyCanvas();

	private final JTree tree = new JTree();
	private final JEditorPane dtrpnHereWillBe = new JEditorPane();
	private final JSplitPane splitPane_2 = new JSplitPane(JSplitPane.VERTICAL_SPLIT);

	private JTable table;
	private JTable table_2 = new JTable();
	private final Model model;
	private final Control controller;

	private final JPanel panel = new JPanel();
	private final JComboBox comboBox = new JComboBox();

	// Buttons
	private final JButton btnAdd = new JButton("Add");
	private final JButton btnDel = new JButton("Del");

	private final JToolBar toolBar = new JToolBar();

	/**
	 * Create the application.
	 */
	public GUI(Control control) {
		this.controller = control;
		this.model = control.getModel();
		control.initListener(this);
		initialize();
	}

	/**
	 * Initialize the contents of the frame.
	 */
	@SuppressWarnings("serial")
	private void initialize() {
		frmCyberPhysical = new JFrame();
		frmCyberPhysical.setTitle("Cyber Physical Systems Model");
		frmCyberPhysical.setBounds(100, 100, 891, 467);
		frmCyberPhysical.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

		frmCyberPhysical.setJMenuBar(menuBar);

		menuBar.add(mnNewMenu);

		mnNewMenu.add(mntmNew);

		mnNewMenu.add(mntmOpen);

		mnNewMenu.add(mntmSave);

		menuBar.add(mnNewMenu_1);

		menuBar.add(mnNewMenu_2);

		menuBar.add(mnNewMenu_3);

		menuBar.add(mnHelp);

		// Table
		String[] columnNames = { "Consumer", "Units", "Number" };

		Object[][] data = { { "TV", "20", "1" }, { "PC", "30", "2" }, { "Fridge", "40", "1" } };

		splitPane.setRightComponent(splitPane_1);
		splitPane.setDividerLocation(200);
		splitPane_1.setDividerLocation(500);
		canvas.setBackground(Color.WHITE);

		tabbedPane.addTab("Modeling", null, canvas, null);
		tabbedPane.addTab("Simulation", null, scrollPane_2, null);
		dtrpnHereWillBe.setText("Here will be the Simulation");

		scrollPane_2.setViewportView(dtrpnHereWillBe);

		splitPane_1.setLeftComponent(tabbedPane);

		JScrollPane scrollPane = new JScrollPane();
		splitPane_1.setRightComponent(splitPane_2);
		splitPane_2.setLeftComponent(scrollPane);
		table = new JTable(data, columnNames);
		scrollPane.setViewportView(table);

		table.setFillsViewportHeight(true);
		table.setModel(new DefaultTableModel(data, columnNames));
		table.setCellSelectionEnabled(true);
		table.setColumnSelectionAllowed(true);
		JScrollPane scrollPane_3 = new JScrollPane();
		splitPane_2.setRightComponent(scrollPane_3);
		scrollPane_3.setViewportView(table_2);

		table_2.setFillsViewportHeight(true);
		table_2.setModel(new DefaultTableModel(new Object[][] { { "Solar", "23", "10" }, { "Generator", "24", "1" },
				{ "Something Else", "25", "3" }, }, new String[] { "Producer", "Units", "Number" }));
		table_2.getColumnModel().getColumn(0).setPreferredWidth(103);
		table_2.getColumnModel().getColumn(1).setPreferredWidth(107);
		table_2.getColumnModel().getColumn(2).setPreferredWidth(125);
		frmCyberPhysical.getContentPane().setLayout(new BorderLayout(0, 0));
		splitPane_2.setDividerLocation(200);

		splitPane.setLeftComponent(scrollPane_1);
		tree.setEditable(true);
		
		Icon icon = new ImageIcon(new ImageIcon(this.getClass().getResource("/Images/Dummy_House.png")).getImage().getScaledInstance(30, 30, java.awt.Image.SCALE_SMOOTH));
		//DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer)tree.getCellRenderer();
		DefaultTreeCellRenderer renderer = (DefaultTreeCellRenderer)tree.getCellRenderer();
        renderer.setLeafIcon(icon);
        //renderer.setClosedIcon(icon);
        //renderer.setOpenIcon(icon);
        tree.setRowHeight(icon.getIconHeight());
		tree.setCellRenderer(renderer);
		
		//add a MouseListener to initiate the Drag on the appropriate
		//MouseEvent
		/*tree.addMouseMotionListener(new MouseAdapter(){
			 	public void mouseDragged(MouseEvent e) {
		            	System.out.println("Drag");
		            	Image img = null;
		            	try {
		            		URL url = new URL("https://cdn4.iconfinder.com/data/icons/buildings-filled-1/60/house-home-building-construction-32.png");
		                  	img = ImageIO.read(url);
		            	} catch (IOException e1) {
		            		System.out.println("Failed to load the Image!");
		            	}
		                JTree treep = (JTree)e.getSource();
		                TransferHandler handle = treep.getTransferHandler();
		                handle.setDragImage(img);
		                handle.exportAsDrag(treep, e, TransferHandler.MOVE);
		            }
		        });*/
		tree.addMouseListener(new MouseAdapter(){
            public void mouseReleased(MouseEvent e){
                	Pair<Integer,Integer> xy = new Pair<Integer, Integer>((int)canvas.getMousePosition().getX(),(int)canvas.getMousePosition().getY());
                	canvas.choords.add(xy);
                	canvas.repaint();
	            }
	        });
		
		scrollPane_1.setViewportView(tree);

		scrollPane_1.setColumnHeaderView(panel);
		panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
		toolBar.setFloatable(false);

		panel.add(toolBar);
		toolBar.add(comboBox);
		comboBox.setModel(new DefaultComboBoxModel(new String[] { "Category", "Object", "Transformer", "Switch" }));

		// Add Button
		btnAdd.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {

				Object nodeInfo = tree.getLastSelectedPathComponent();
				String selectedOption = comboBox.getSelectedItem().toString();
				DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) nodeInfo;
				
				switch(selectedOption){
				
					case "Category":
						String catName = JOptionPane.showInputDialog("Please enter a Name for Category ");
						if(catName != ""){
						controller.addNewCategory(catName);
						}
						break;
							
					default :
						addObjectAction(selectedOption, selectedNode);
						break;
				}
			}
		});
		
		toolBar.add(btnAdd);

		// Del Button
		btnDel.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent arg0) {

				Object nodeInfo = tree.getLastSelectedPathComponent();
				DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) nodeInfo;
				String nodeName = selectedNode.getUserObject().toString();
				int depthOfNode = selectedNode.getLevel();
				
				switch(depthOfNode){
				case 1:
					controller.deleteCategory(nodeName);
					break;
				case 2:
					DefaultMutableTreeNode parent = (DefaultMutableTreeNode) selectedNode.getParent();
					controller.deleteObjectInCat(nodeName,parent.getUserObject().toString());
					break;
				}
				


			}
		});
		toolBar.add(btnDel);
		frmCyberPhysical.getContentPane().add(splitPane);

		mntmOpen.addActionListener(new java.awt.event.ActionListener() {
			@Override
			public void actionPerformed(java.awt.event.ActionEvent evt) {
				menuFileExitActionPerformed(evt);
			}

			private void menuFileExitActionPerformed(java.awt.event.ActionEvent evt) {
				JFileChooser fileChooser = new JFileChooser();
				JFrame test = new JFrame();
				if (fileChooser.showOpenDialog(test) == JFileChooser.APPROVE_OPTION) {
					File file = fileChooser.getSelectedFile();
					System.out.println("File Path is: " + file.toString());
				}
			}
		});

	}
	
	/*
	 * adds a specific object type to selected Category 
	 * also handles input windows and illegal inputs
	 */
	public void addObjectAction(String objType, DefaultMutableTreeNode selectedNode){
		if(selectedNode == null){
			JOptionPane.showMessageDialog(new JFrame(), "Please select a Category first before adding " + objType + ".");
		}
		//if selected node is a directory for Categories
		else{
			if(selectedNode.getLevel()==1){
				String objname = JOptionPane.showInputDialog("Please enter a Name for the " + objType);
				Category cat = controller.searchCategory(selectedNode.getUserObject().toString());
				switch(objType){
				
				case "Object": 
					controller.addNewObject( cat , objname);
					break;
				
				case "Switch" :
					controller.addNewSwitch(cat, objname);
					
				case "Transformer" :
					controller.addNewTransformer(cat, objname);
				}
			}
			else{
				JOptionPane.showMessageDialog(new JFrame(), "Objects can not be added to Objects. Please select a Category.");
				}
		}
	}

	/**
	 * reloads the Categories from Model
	 */
	public void updateCategories(final ArrayList<Category> categories) {
		tree.setModel(new DefaultTreeModel(new DefaultMutableTreeNode("Categories") {
			{
				DefaultMutableTreeNode node_1;
				for (Category c : categories) {
					node_1 = new DefaultMutableTreeNode(c.getName());

					// kann eventuell umgeändert werden
					for (CpsObject obj : c.getObjects()) {
						node_1.add(new DefaultMutableTreeNode(obj.getObjName()));
					}
					add(node_1);
				}

			}
		}));
	}

	/**
	 * 
	 */
	public void onChange(ArrayList<Category> categories) {
		DefaultTreeModel model = (DefaultTreeModel) tree.getModel();
		updateCategories(categories);
		model.reload();
	}

	/**
	 * 
	 * @return
	 */
	public JFrame getFrmCyberPhysical() {
		return frmCyberPhysical;
	}

}